Please I need 1 line explanation for each answer

9. Medro & Mariana decided they were going to respect the environment by using recycled plates, napkins, drinking cups, and take-away boxes. They are thinking mainly about: O a. green operations b. over-processing O c. lean production d. supply chain management 10. Mariana and Medro's, Liliana, was talking to them one day. She said: I am sure you can cut down on some of the costs by looking for places in the production system where waste can be removed or at least minimized." She suggested to them to follow a system to accomplish this. What do you think she said? a. use a production system b. use Lean Production c. use supply chain management feedback, & contro d. use a system